EP3591092B1 - Élément coulissant de conception élevée - Google Patents

Élément coulissant de conception élevée Download PDF

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Publication number
EP3591092B1
EP3591092B1 EP17898943.0A EP17898943A EP3591092B1 EP 3591092 B1 EP3591092 B1 EP 3591092B1 EP 17898943 A EP17898943 A EP 17898943A EP 3591092 B1 EP3591092 B1 EP 3591092B1
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EP
European Patent Office
Prior art keywords
layer
chemical conversion
sliding member
topcoat layer
zinc
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EP17898943.0A
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German (de)
English (en)
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EP3591092A4 (fr
EP3591092A1 (fr
Inventor
Satoshi Watanabe
Soichiro Sugawara
Ikuo KONNO
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
    • C23C22/30—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds containing also trivalent chromium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
    • C23C22/53—Treatment of zinc or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/82—After-treatment
    • C23C22/83—Chemical after-treatment
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/22—Electroplating: Baths therefor from solutions of zinc
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/203—Multilayer structures, e.g. sleeves comprising a plastic lining
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/208—Methods of manufacture, e.g. shaping, applying coatings
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
    • C23C2222/10—Use of solutions containing trivalent chromium but free of hexavalent chromium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/50—Alloys based on zinc
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/30—Coating surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/30—Coating surfaces
    • F16C2223/70—Coating surfaces by electroplating or electrolytic coating, e.g. anodising, galvanising
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/60—Thickness, e.g. thickness of coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/60—Thickness, e.g. thickness of coatings
    • F16C2240/64—Thickness, e.g. thickness of coatings in the nanometer range
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12542—More than one such component
    • Y10T428/12549—Adjacent to each other

Definitions

  • the present invention relates to sliding members including zinc-plated layers subjected to chemical conversion treatment, and more particularly, to a high-gloss metallic sliding member with less tinge of yellow or red.
  • Zinc plating is widely used for preventing corrosion of iron.
  • Zing plating has a function as a sacrificial coating for a metal substrate containing iron, for example.
  • Zinc dissolves itself so as to prevent corrosion of the metal substrate.
  • white rust occurs on the surface of the zinc plating in air relatively for a short period of time to degrade glossiness.
  • Recent zinc plating includes chemical conversion treatment using chromic acid to prevent white rust described above, and prevents both a cause of white rust and dissolution of zinc due to the synergistic effects of the zinc plating and the chemical conversion-treated layer, so as to protect against corrosion of the metal substrate including iron, and keep glossiness on the surface of the plated layer.
  • the chemical conversion treatment leads to an interference color on the zinc-plated surface to cause color irregularity, which is not desirable to a member such as a component for a vehicle, architectural hardware, and a mechanical component, which are required to have a high-design appearance.
  • plating containing nickel (Ni) is typically used.
  • Patent Document 1 discloses a sliding member including, on a surface of a metallic substrate, a zinc alloy-plated film including nickel and molybdenum and having a black-colored appearance.
  • a coated metal product comprising a metal substrate, in particular, a steel substrate, coated with a zinc-plated layer, a chromium-containing conversion layer, and a topcoat layer including at least one material selected from the group consisting of a silica compound, acrylic resin, polyurethane resin, epoxy resin, phenol resin, and melamine resin are described in each of the documents JP H1018078 A , JP H0657441 A , EP 1318214 A1 , and JP 2002 060962 A .
  • the zinc alloy-plated film disclosed in Patent Document 1 is costly to manufacture, since the plated layer includes an alloy containing metal, such as nickel, other than zinc.
  • Patent Document 1 cannot be manufactured using a conventional zinc-plating production line, and thus has less versatility.
  • the present invention provides a high-design sliding member having high metallic glossiness and using low-cost zinc plating while avoiding an interference color.
  • the present invention also provides a method of manufacturing a versatile sliding member manufactured with a conventional zinc-plating production line without being greatly modified.
  • the inventors of the present invention devoted themselves to continuous studies to achieve the object described above, so as to accomplish the objects described above and complete the present embodiment by forming a topcoat layer, on a zinc-plated surface subjected to chemical conversion treatment, including at least one material selected from the group consisting of a silica compound, acrylic resin, polyurethane resin, epoxy resin, phenol resin, and melamine resin, so as to increase glossiness while decreasing an interference color caused in a chemical conversion-treated layer, and greatly improve corrosion resistance and sliding performance.
  • a silica compound including at least one material selected from the group consisting of a silica compound, acrylic resin, polyurethane resin, epoxy resin, phenol resin, and melamine resin
  • the present invention provides a sliding member according to claim 1.
  • the present invention also provides a method of manufacturing a sliding member according to claim 3.
  • the topcoat layer including at least one material selected from the group consisting of a silica compound, acrylic resin, polyurethane resin, epoxy resin, phenol resin, and melamine resin, is formed on the zinc-plated surface subjected to chemical conversion treatment, so as to provide a high-gloss sliding member with less interference color caused in the chemical conversion-treated layer.
  • the method includes the step of forming, on the zinc-plated surface subjected to chemical conversion treatment, the topcoat layer including at least one material selected from the group consisting of a silica compound, acrylic resin, polyurethane resin, epoxy resin, phenol resin, and melamine resin, so as to provide a versatile sliding member manufactured with a conventional zinc-plating production line without being greatly modified.
  • a sliding member according to the present invention will be described in detail below.
  • the sliding member includes a surface-treated layer on a surface of a metal substrate.
  • the surface-treated layer is provided with a topcoat layer including at least one material selected from the group consisting of a silica compound, acrylic resin, polyurethane resin, epoxy resin, phenol resin, and melamine resin, on a zinc-plated surface subjected to chemical conversion treatment.
  • the surface-treated layer includes a zinc-plated layer 2, a chemical conversion-treated layer 3, and the topcoat layer 4 sequentially stacked on the metal substrate.
  • the topcoat layer includes at least one material selected from the group consisting of a silica compound, acrylic resin, polyurethane resin, epoxy resin, phenol resin, and melamine resin (hereinafter also referred to as a "topcoat layer composition"), and is a clear layer coating the zinc-plated surface subjected to chemical conversion treatment.
  • a silica compound acrylic resin, polyurethane resin, epoxy resin, phenol resin, and melamine resin
  • the transparency of the topcoat layer leads to metallic glossiness and cancels out an interference color or color irregularity of the chemical conversion-treated layer, since light passing through the topcoat layer reflects from the chemical conversion-treated layer, so as to achieve a silver-colored high-design appearance while suppressing coloration, in which, according to the L*a*b* color system, a value of L* is 85 or greater, a value of
  • transparent means that light transmittance of visible light with wavelengths from 380 nm to 780 nm is 70% or greater.
  • the reason for the glossy silver-colored appearance obtained due to the arrangement of the topcoat layer is not clear, but is presumed to be that an interference color caused by the chemical conversion-treated layer is suppressed, and light specularly reflected from the zinc-plated surface is dominant.
  • the applied amount of the topcoat layer is in a range of 0.3 mg/m 2 or greater and 8.0 mg/m 2 or less, and preferably in a range of 0.3 mg/m 2 to 3.5 mg/m 2 .
  • the applied amount of less than 0.3 mg/m 2 cannot completely cover the chemical conversion-treated layer, and may cause damage to the topcoat layer.
  • the corrosion resistance can be increased, when the sliding member needs to have higher corrosion resistance.
  • the applied amount exceeding 8.0 mg/m 2 may cause overgrown crystals in a white powder state depending on the silica compound used, leading to degradation in metallic glossiness with the passage of time.
  • the applied amount of the topcoat layer may be measured such that the topcoat layer deposited on the sliding member is removed so as to calculate the weight per unit area.
  • the topcoat layer composition included in the topcoat layer can be any material that has high adhesion to the chemical conversion-treated layer and high transparency, and can block moisture and oxygen.
  • the topcoat layer composition can be a silica compound, in addition to the above resin components such as acrylic resin, polyurethane resin, epoxy resin, phenol resin, and melamine resin. Examples of such silica compounds include silica and silicate.
  • the topcoat layer composition may include one of these components or may include more than one so as to be combined together.
  • the topcoat layer composition including a silica compound has high smoothing properties and decreases sliding resistance, and is thus appropriate for the use of a sliding member, such as a headrest stay for a vehicle, to which a lubricant cannot be applied.
  • the topcoat layer composition is preferably soluble or dispersible in water.
  • the aqueous topcoat layer composition eliminates the use of an oleaginous solvent, so as to form the topcoat layer continuously after the formation of the zinc-plated layer. This facilitates the treatment without a conventional zinc-plating production line being greatly modified.
  • the topcoat layer may be formed by the step of applying an aqueous topcoat layer-coating liquid containing the topcoat layer composition described above and then drying it.
  • the chemical conversion-treated layer includs chromium (Cr) and oxygen (O) and is a film is formed on the zinc plating, so as to prevent white rust of the zinc plating and retard red rust caused in the metal substrate.
  • the thickness of the chemical conversion-treated layer is in a range of 50 nm to 300 nm. Setting the thickness of the chemical conversion-treated layer in the above range can achieve a silver-colored glossy appearance together with the effects of the topcoat layer.
  • the chemical conversion-treated layer with a thickness of less than 50 nm may have low corrosion resistance and tends to easily cause red rust, leading to a degrade high-design appearance.
  • the chemical conversion-treated layer with a thickness exceeding 300 nm may increase an interference color and tends to be tinged with yellow or red, preventing the interference color or color irregularity from being canceled out by the topcoat layer.
  • the thickness of the chemical conversion-treated layer may be measured such that an image of the surface-treated layer in cross section is captured.
  • the chemical conversion-treated layer may be formed such that the zinc-plated metal substrate is impregnated in a chemical conversion treatment liquid mainly containing trivalent chromic acid or dichromate.
  • the chemical conversion-treated layer using a chromate liquid mainly containing trivalent chromium has lower self-restoring performance and corrosion resistance than a chemical conversion-treated layer mainly containing hexavalent chromium, but can sufficiently keep the glossy appearance for a long period of time since the corrosion resistance is improved due to the presence of the topcoat layer.
  • the zinc-plated layer protects the metal substrate against corrosion due to its sacrificially self-corroding function.
  • the zinc-plated layer according to the present invention may be any plated layer that has a metallic glossy appearance, and is preferably a zinc-electroplated layer which contributes to less surface roughness and facilitates a high glossy appearance.
  • a thickness of the zinc-plated layer is preferably 3 ⁇ m or greater.
  • the thickness of 3 ⁇ m or greater improves the corrosion resistance.
  • the excessively-reduced thickness of the zinc-plated layer wears out the zinc plating relatively soon because of its sacrificially self-corroding function, reducing the corrosion resistance.
  • the zinc electroplating uses metal ions in the plating liquid and stacks plating metal on the surface of the metal substrate at an atomic level by electrical energy so as to form the layer. Since the thickness increased by the electroplating is limited to a certain extent, the practical upper limit of the thickness increased by the electroplating is about 20 ⁇ m.
  • the thickness of the zinc-plated layer may be measured such that an image of the surface-treated layer in cross section is captured.
  • the metal substrate can include metal which is nobler than zinc, and is preferably an iron-based metal substrate such as a steel material.
  • the sliding member described above can be manufactured such that the surface-treated layer is stacked on the surface of the metal substrate processed into a product state.
  • a method of manufacturing the sliding member according to the present embodiment includes a step of forming the topcoat layer on the sliding member including the zinc-plated layer subjected to chemical conversion treatment.
  • the zinc-plated layer subjected to chemical conversion treatment may be formed by a conventional method.
  • the metal substrate processed into a product state is cleaned and degreased, so that the zinc-plated layer is formed by electroplating thereon.
  • the surface of the zinc-plated layer is then subjected to acid activation with diluted nitric acid, and is impregnated in a chemical conversion treatment liquid (an acidic aqueous solution) containing trivalent chromic acid, so as to obtain the zinc-plated layer with the surface subjected to chemical conversion treatment.
  • a chemical conversion treatment liquid an acidic aqueous solution
  • a plating bath for forming the zinc-plated layer by electroplating may be either an acidic bath or an alkaline bath.
  • alkaline baths include a cyan-based bath and a zincate-based bath.
  • the zinc plating using a cyan-based bath provides uniform electrodeposition, smoothness, and flexibility of a plated film.
  • acidic baths include a chloride bath and a sulfate bath.
  • chloride baths include a zinc ammonium chloride bath, a zinc potassium chloride bath, and a zinc ammonium/potassium chloride bath.
  • the electroplated layer may be formed by a known plating method, for example, such that metal is precipitated on the surface of the metal substrate, used as a negative electrode, at an appropriate current density in a plating bath containing metallic salt, conductive filler, a hydrogen ion concentration adjuster, an additive, and the like.
  • the chemical conversion treatment liquid may be a conventionally-used chemical conversion treatment liquid, such as bright chromate, colored chromate, or blue chromate, but is preferably a chromate liquid mainly containing trivalent chromium.
  • the chemical conversion-treated layer may be formed such that the zinc-plated metal substrate is impregnated in the chemical conversion treatment liquid (chromate liquid) including trivalent chromium.
  • chromate liquid chemical conversion treatment liquid
  • a chromic acid concentration, temperature, pH, and treatment time of the chemical conversion treatment liquid used for forming the trivalent-chromium chemical conversion-treated layer may be determined as appropriate, but the chromic acid concentration is preferably in a range of 50 g/l to 150 g/l, the treatment temperature is preferably in a range of 20°C to 50°C, pH is preferably in a range of 1.0 to 3.0, and the treatment time is preferably in a range of 20 to 90 seconds.
  • the excessively low chromic acid concentration may impede the formation of the chemical conversion-treated layer having a sufficient thickness, while the excessively high chromic acid concentration may decrease the efficiency of forming the chemical conversion-treated layer, leading to a decrease in productivity.
  • the excessively high temperature may lead to excessive dissolution of the metal substrate, while the excessively low temperature may decrease the reactivity, leading to degradation of appearance.
  • the excessively high pH may impede the formation of an appropriate chemical conversion-treated layer due to lack of etching, and the insufficient treatment time may impede the formation of the chemical conversion-treated layer having a sufficient thickness, while the treatment time set to longer than 90 seconds may decrease the efficiency of forming the chemical conversion-treated layer, leading to a decrease in productivity.
  • the method of manufacturing the sliding member according to the present invention includes a step of applying an aqueous topcoat layer-coating liquid containing the topcoat layer composition to the surface of the chemical conversion-treated zinc-plated layer and drying it so as to form the topcoat layer.
  • the step of applying the topcoat layer-coating liquid may be a conventional coating step, such as an impregnation method or a spray coating method, and the impregnation method is particularly preferable since the method facilitates the formation of the topcoat layer with an even thickness.
  • a concentration of the topcoat layer composition in the topcoat layer-coating liquid is preferably in a range of 5 g/l to 100 g/l, and more preferably in a range of 5 g/l to 35 g/l.
  • the concentration of the topcoat layer composition set in the above range can decrease a viscosity of the topcoat layer-coating liquid, so as to form the thin and smooth topcoat layer.
  • the manufacturing method preferably includes a step of applying an air blow after applying the topcoat layer-coating liquid by impregnation and before drying.
  • the blowing step blows away an excessive amount of the topcoat layer-coating liquid remaining at the lower edge portion of the sliding member drawn from the topcoat layer-coating liquid, so as to obtain the topcoat layer having a uniform thickness and prevent a drip of the liquid during the drying step, leading to an improvement in operability.
  • the topcoat layer is preferably heated and dried at a temperature in a range of 60°C to 100°C. A shorter drying time after the application of the topcoat layer-coating liquid can prevent overgrown crystals and contribute to the formation of the topcoat layer having a uniform thickness.
  • the method of manufacturing the sliding member according to the present invention described above can use a versatile zinc-plating production line only adding the steps of the topcoat layer impregnation and the air blow to a typical zinc-plating production line.
  • An acidic plating bath A and an alkaline plating bath B as shown in the following table 1 were prepared.
  • Acidic bath A Alkaline bath B
  • Metal zinc 30 g/L 13 g/L NH 4 Cl 35 g/L - NaOH - 140 g/L
  • Brightener 40 g/L 9 g/L Bath temperature 28°C 30°C
  • Table 2 shows the chromic acid concentration, pH, and bath temperature of the respective chemical conversion treatment liquids.
  • Organic acid chromate P Organic acid silica chromate Q Blue chromate R Chromium concentration 6.3 g/L 6 g/L 1.2 g/L pH 2 2.4 2 Bath temperature 28°C 28°C 28°C
  • a silica-based compound (SiO 2 ) (Hydroklad Si: 174439: MacDermid Enthone INDUSTRIAL SOLUTIONS) was dissolved in water so as to prepare a topcoat layer-coating liquid X.
  • a topcoat layer-coating liquid Y containing a silica-based compound (SiO 2 ) (ULTRASEAL: 118639: MacDermid Enthone INDUSTRIAL SOLUTIONS), and a topcoat layer-coating liquid Z containing acrylic resin (Post-dip: 187387: MacDermid Enthone INDUSTRIAL SOLUTIONS) were prepared.
  • Table 3 shows the concentration, pH, and bath temperature of the topcoat layer composition in the respective coating liquids.
  • a degreased metal substrate (steel material) having a cylindrical stick shape with a diameter of 1 centimeter was impregnated in the acidic bath A with the composition shown in Table 1 for 15 minutes at a current density of 3 A/dm 2 , and was then washed with water so as to prepare a zinc-plated layer having a thickness of 8 ⁇ m.
  • the product After being subjected to acid activation with diluted nitric acid, the product was impregnated in the chemical conversion treatment liquid P shown in Table 2 for 45 seconds, and was then drawn out and washed with water so as to prepare a chemical conversion-treated layer having a thickness of 220 nm.
  • the product was further impregnated in the topcoat layer-coating liquid X shown in Table 3 for 35 seconds, drawn out and blown off by air to blow away the excessive amount of the coating liquid, and then dried in a constant-temperature tank at 80°C so as to obtain a sliding member to which a topcoat layer of 3.3 mg/m 2 was applied.
  • a sliding member of this example was obtained in the same manner as Example 1 except that the product was impregnated in the topcoat layer-coating liquid Y shown in Table 3 for 45 seconds, instead of the topcoat layer-coating liquid X.
  • a sliding member of this example was obtained in the same manner as Example 1 except that the product was impregnated in the topcoat layer-coating liquid Z shown in Table 3 for 30 seconds, instead of the topcoat layer-coating liquid X.
  • a sliding member of this example was obtained in the same manner as Example 1 except that the product was impregnated in the chemical conversion treatment liquid Q shown in Table 2 for 60 seconds, instead of the chemical conversion treatment liquid P, and was then drawn out and washed with water so as to prepare a chemical conversion-treated layer having a thickness of 220 nm.
  • a sliding member of this example was obtained in the same manner as Example 4 except that the product was impregnated in the topcoat layer-coating liquid Y shown in Table 3 for 45 seconds, instead of the topcoat layer-coating liquid X.
  • a sliding member of this example was obtained in the same manner as Example 4 except that the product was impregnated in the topcoat layer-coating liquid Z shown in Table 3 for 30 seconds, instead of the topcoat layer-coating liquid X.
  • a sliding member of this example was obtained in the same manner as Example 1 except that the product was impregnated in the chemical conversion treatment liquid R shown in Table 2 for 30 seconds, instead of the chemical conversion treatment liquid P, and was then drawn out and washed with water so as to prepare a chemical conversion-treated layer having a thickness of 220 nm.
  • a sliding member of this example was obtained in the same manner as Example 7 except that the product was impregnated in the topcoat layer-coating liquid Y shown in Table 3 for 45 seconds, instead of the topcoat layer-coating liquid X.
  • a sliding member of this example was obtained in the same manner as Example 7 except that the product was impregnated in the topcoat layer-coating liquid Z shown in Table 3 for 30 seconds, instead of the topcoat layer-coating liquid X.
  • a sliding member of this example was obtained in the same manner as Example 1 except that the degreased metal substrate was impregnated in the alkaline bath B with the composition shown in Table 1 for 25 minutes at a current density of 3 A/dm 2 , and was then washed with water so as to prepare a zinc-plated layer having a thickness of 8 ⁇ m.
  • a sliding member of this example was obtained in the same manner as Example 10 except that the product was impregnated in the topcoat layer-coating liquid Y shown in Table 3 for 45 seconds, instead of the topcoat layer-coating liquid X.
  • a sliding member of this example was obtained in the same manner as Example [10] except that the product was impregnated in the topcoat layer-coating liquid Z shown in Table 3 for 30 seconds, instead of the topcoat layer-coating liquid X.
  • a sliding member of this example was obtained in the same manner as Example 10 except that the product was impregnated in the chemical conversion treatment liquid Q shown in Table 2 for 60 seconds, instead of the chemical conversion treatment liquid P, and was then drawn out and washed with water so as to prepare a chemical conversion-treated layer having a thickness of 220 nm.
  • a sliding member of this example was obtained in the same manner as Example 13 except that the product was impregnated in the topcoat layer-coating liquid Y shown in Table 3 for 45 seconds, instead of the topcoat layer-coating liquid X.
  • a sliding member of this example was obtained in the same manner as Example 13 except that the product was impregnated in the topcoat layer-coating liquid Z shown in Table 3 for 30 seconds, instead of the topcoat layer-coating liquid X.
  • a sliding member of this example was obtained in the same manner as Example 10 except that the product was impregnated in the chemical conversion treatment liquid R shown in Table 2 for 30 seconds, instead of the chemical conversion treatment liquid P, and was then drawn out and washed with water so as to prepare a chemical conversion-treated layer having a thickness of 220 nm.
  • a sliding member of this example was obtained in the same manner as Example 16 except that the product was impregnated in the topcoat layer-coating liquid Y shown in Table 3 for 45 seconds, instead of the topcoat layer-coating liquid X.
  • a sliding member of this example was obtained in the same manner as Example 16 except that the product was impregnated in the topcoat layer-coating liquid Z shown in Table 3 for 30 seconds, instead of the topcoat layer-coating liquid X.
  • a sliding member of this example was obtained in the same manner as Example 12 except that the degreased metal substrate was impregnated in the alkaline bath B with the composition shown in Table 1 for 25 minutes at a current density of 0.38 A/dm 2 , and was then washed with water so as to prepare a zinc-plated layer having a thickness of 1 ⁇ m.
  • a sliding member of this example was obtained in the same manner as Example 12 except that the degreased metal substrate was impregnated in the alkaline bath B with the composition shown in Table 1 for 25 minutes at a current density of 1.13 A/dm 2 , and was then washed with water so as to prepare a zinc-plated layer having a thickness of 3 ⁇ m.
  • a sliding member of this example was obtained in the same manner as Example 12 except that the degreased metal substrate was impregnated in the alkaline bath B with the composition shown in Table 1 for 25 minutes at a current density of 1.88 A/dm 2 , and was then washed with water so as to prepare a zinc-plated layer having a thickness of 5 ⁇ m.
  • a sliding member of this example was obtained in the same manner as Example 12 except that the degreased metal substrate was impregnated in the alkaline bath B with the composition shown in Table 1 for 25 minutes at a current density of 4.88 A/dm 2 , and was then washed with water so as to prepare a zinc-plated layer having a thickness of 13 ⁇ m.
  • a sliding member of this example was obtained in the same manner as Example 14 except that a chemical conversion treatment liquid Q having a chromic acid concentration of 60 g/1 was used so as to prepare a chemical conversion-treated layer having a thickness of 40 nm.
  • a sliding member of this example was obtained in the same manner as Example 14 except that a chemical conversion treatment liquid Q having a chromic acid concentration of 80 g/l and pH of 3.3 was used so as to prepare a chemical conversion-treated layer having a thickness of 40 nm.
  • a sliding member of this example was obtained in the same manner as Example 14 except that a chemical conversion treatment liquid Q having a chromic acid concentration of 60 g/l was used so as to prepare a chemical conversion-treated layer having a thickness of 160 nm.
  • a sliding member of this example was obtained in the same manner as Example 14 except that a chemical conversion treatment liquid Q having a chromic acid concentration of 100 g/l was used so as to prepare a chemical conversion-treated layer having a thickness of 220 nm.
  • a sliding member of this example was obtained in the same manner as Example 14 except that a chemical conversion treatment liquid Q having a chromic acid concentration of 120 g/l was used so as to prepare a chemical conversion-treated layer having a thickness of 220 nm.
  • a sliding member of this example was obtained in the same manner as Example 17 except that the product was impregnated in a topcoat layer-coating liquid Y having a chromic acid concentration of 5 g/l for 45 seconds so as to prepare a topcoat layer with the applied amount of 0.3 mg/m 2 .
  • a sliding member of this example was obtained in the same manner as Example 17 except that the product was impregnated in a topcoat layer-coating liquid Y having a chromic acid concentration of 10 g/l for 45 seconds so as to prepare a topcoat layer with the applied amount of 1.7 mg/m 2 .
  • a sliding member of this example was obtained in the same manner as Example 17 except that the product was impregnated in a topcoat layer-coating liquid Y having a chromic acid concentration of 30 g/l for 45 seconds so as to prepare a topcoat layer with the applied amount of 3.3 mg/m 2 .
  • a sliding member of this example was obtained in the same manner as Example 17 except that the product was impregnated in a topcoat layer-coating liquid Y having a chromic acid concentration of 50 g/l for 45 seconds so as to prepare a topcoat layer with the applied amount of 4.9 mg/m 2 .
  • a sliding member of this example was obtained in the same manner as Example 17 except that the product was impregnated in a topcoat layer-coating liquid Y having a chromic acid concentration of 70 g/l for 45 seconds so as to prepare a topcoat layer with the applied amount of 7.7 mg/m 2 .
  • a sliding member of this example was obtained in the same manner as Example 1 except that the topcoat layer was not prepared.
  • a sliding member of this example was obtained in the same manner as Example 4 except that the topcoat layer was not prepared.
  • a sliding member of this example was obtained in the same manner as Example 7 except that the topcoat layer was not prepared.
  • a sliding member of this example was obtained in the same manner as Example 10 except that the topcoat layer was not prepared.
  • a sliding member of this example was obtained in the same manner as Example 13 except that the topcoat layer was not prepared.
  • a sliding member of this example was obtained in the same manner as Example 16 except that the topcoat layer was not prepared.
  • a sliding member of this example was obtained in the same manner as Example 1 except that the chemical conversion-treated layer was not prepared.
  • a sliding member of this example was obtained in the same manner as Example 2 except that the chemical conversion-treated layer was not prepared.
  • a sliding member of this example was obtained in the same manner as Example 3 except that the chemical conversion-treated layer was not prepared.
  • a sliding member of this example was obtained in the same manner as Example 10 except that the chemical conversion-treated layer was not prepared.
  • a sliding member of this example was obtained in the same manner as Example 11 except that the chemical conversion-treated layer was not prepared.
  • a sliding member of this example was obtained in the same manner as Example 12 except that the chemical conversion-treated layer was not prepared.
  • the sliding members obtained in Examples 1 to 32 and Comparative Examples 1 to 12 were evaluated by the following method.
  • the members only provided by a hot-dip galvanizing were evaluated at the same time.
  • Table 6 lists the evaluation results of the sliding members
  • Table 7 lists the evaluation results of the members only provided by the hot-dip galvanizing.
  • the specular glossiness (60° gloss) on the surface of each sliding member was measured with micro-TRI-gloss available from BYK Gardner.
  • L*a*b* values of the sliding members were measured under the illuminant D65, viewing angle of 10°, and SCI (specular component include) mode with L*a*b* color system Spectrophotometer CM-700d available from KONICA MINOLTA INC. Table 4 lists the evaluation criteria.
  • each sliding member was held with a contact surface pressure of 40 MPa, and the power required when the sliding member was pulled out at a sliding speed of 20 mm/s was measured.
  • AA Less than 50 N
  • A 50 N or greater to less than 60 N NG: 60 N or greater
  • Fig. 2 and Fig. 3 show SEM images of the surfaces of the sliding members obtained in Example 29 and Example 31.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Laminated Bodies (AREA)
  • Chemical Treatment Of Metals (AREA)

Claims (6)

  1. Élément coulissant comprenant, sur une surface d'un substrat métallique (1), une couche traitée en surface comprenant une couche zinguée (2), une couche traitée par conversion chimique (3) et une couche de finition (4) empilées de manière séquentielle sur le substrat métallique (1),
    la couche traitée par conversion chimique (3) comprenant du chrome et de l'oxygène,
    la couche de finition (4) étant une couche claire comprenant au moins un matériau choisi dans le groupe comprenant un composé de silice, d'une résine acrylique, d'une résine de polyuréthane, d'une résine époxy, d'une résine phénolique et d'une résine de mélamine,
    dans lequel une valeur de L* est de 85 ou plus, une valeur de |a*| est inférieure à 6, une valeur de |b*| est inférieure à 8 et un niveau de brillant métallique est de 170 ou plus sur une surface de l'élément coulissant selon un système de couleurs L*a*b*,
    dans lequel une quantité appliquée de la couche de finition (4) est de 0,3 mg/m2 ou plus et de 8,0 mg/m2 ou moins, et
    dans lequel une épaisseur de la couche traitée par conversion chimique (3) est dans une plage allant de 50 nm à 300 nm.
  2. Élément coulissant selon la revendication 1, dans lequel une épaisseur de la couche zinguée (2) est dans une plage allant de 3 µm à 20 µm.
  3. Procédé de fabrication d'un élément coulissant comprenant, sur une surface d'un substrat métallique (1), une couche traitée en surface comprenant une couche zinguée (2), une couche traitée par conversion chimique (3) et une couche de finition (4) empilées de manière séquentielle sur le substrat métallique (1),
    la couche traitée par conversion chimique (3) comprenant du chrome et de l'oxygène,
    la couche de finition (4) étant une couche claire réalisée en au moins un matériau choisi dans le groupe comprenant un composé de silice, une résine acrylique, une résine de polyuréthane, une résine époxy, une résine phénolique et une résine de mélamine,
    dans lequel une valeur de L* est de 85 ou plus, une valeur de |a*| est inférieure à 6, une valeur de |b*| est inférieure à 8 et un niveau de brillant métallique est de 170 ou plus sur une surface de l'élément coulissant selon un système de couleurs L*a*b*,
    dans lequel le procédé comprend une étape de formation de la couche de finition (4) sur une surface de la couche traitée par conversion chimique (3) et une étape de formation de la couche traitée par conversion chimique (3) avant l'étape de formation de la couche de finition (4),
    dans lequel l'étape de formation de la couche de finition (4) est un processus de formation de la couche de finition (4) avec une quantité appliquée de 0,3 mg/m2 ou plus et de 8,0 mg/m2 ou moins, et
    l'étape de formation de la couche traitée par conversion chimique (3) est un processus de formation de la couche traitée par conversion chimique (3) ayant une épaisseur dans une plage allant de 50 nm à 300 nm.
  4. Procédé de fabrication de l'élément coulissant selon la revendication 3, dans lequel l'étape de formation de la couche de finition (4) comprend un processus d'application d'un liquide de revêtement de couche de finition par imprégnation au substrat métallique (1) pourvu de la couche zinguée (2) et de la couche traitée par conversion chimique (3) et à appliquer ensuite un soufflage d'air.
  5. Procédé de fabrication de l'élément coulissant selon la revendication 3 ou 4, comprenant en outre une étape de séchage après l'étape de formation de la couche de finition (4).
  6. Procédé de fabrication de l'élément coulissant selon l'une quelconque des revendications 3 à 5, comprenant en outre une étape de formation de la couche zinguée (2) sur la surface du substrat métallique (1) avant l'étape de formation de la couche traitée par conversion chimique (3),
    dans lequel l'étape de formation de la couche zinguée (2) est un processus de formation de la couche zinguée (2) ayant une épaisseur dans une plage allant de 3 µm à 20 µm par électrodéposition.
EP17898943.0A 2017-03-03 2017-03-03 Élément coulissant de conception élevée Active EP3591092B1 (fr)

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JP3363033B2 (ja) * 1996-06-28 2003-01-07 株式会社神戸製鋼所 電気亜鉛系めっき鋼板
JP2002060962A (ja) * 2000-08-08 2002-02-28 Nkk Corp 亜鉛系めっき鋼板
JP3332373B1 (ja) * 2001-11-30 2002-10-07 ディップソール株式会社 亜鉛及び亜鉛合金めっき上に六価クロムフリー防錆皮膜を形成するための処理溶液、六価クロムフリー防錆皮膜及びその形成方法。
JP2003261825A (ja) * 2002-03-07 2003-09-19 Kansai Paint Co Ltd 潤滑鋼板用表面処理組成物及び潤滑鋼板
ATE518019T1 (de) * 2002-04-05 2011-08-15 Toyo Kohan Co Ltd Lagerdichtung umfassend ein oberflächenbehandeltes stahlblech
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DE102007021364A1 (de) * 2007-05-04 2008-11-06 Henkel Ag & Co. Kgaa Metallisierende Vorbehandlung von Zinkoberflächen
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CN110366606A (zh) 2019-10-22
RU2730326C1 (ru) 2020-08-21
US20210130961A1 (en) 2021-05-06
MX2019010129A (es) 2019-10-02
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CN110366606B (zh) 2021-11-16
JPWO2018158959A1 (ja) 2020-01-23
JP6758611B2 (ja) 2020-09-23

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